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81 Cards in this Set

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Physical Topology

Is the arrangement of the cables, network devices and end systems. It describes how the network devoces are actually interconnected with wires and cables.


Logical topology

The path over which the date is transferred in a network. It describes how the network devices appear connected to network users.



It is a measure of the data rate in bits per second of a given link in the network.


Indicates the general expense for purchasing of network components, and installation and maintenance of the network.


It indicates how protected the network is, including the info that is transmitted over the network.


It is the likelihood that the network is available for use when it is required.


It indicates how easily the network can accommodate more users and data transmission requirements.


Indicates the dependability of the components that make up the network (e.g. routers, switches)

Mean Time Between Failures (MTBF)

Reliability is often measured as _______.

Routing table

When a packet arrives on a router interface, the router uses its ________ to determine how to reach the destination network.


Router is a specialized ______.

Cisco Internetwork Operating System

What is the OS used by Cisco devices?


Memory that loses its content when the power is turned off.


Memory that does not lose its contents when the power is turned off.


Volatile memory

1. Running IOS

2. Running config file

3. IP routing and ARP tables

4. Packet buffer


Nonvolatile memory

1. Bootup instructions

2. Basic diagnostic software

3. Limited IOS in case the router cannot load the full featured IOS


Nonvolatile memory

1. Startup configuration file


Nonvolatile memory

1. IOS

2. Other system related files


Unlike a computer, the router does not have video adapters or sound card adapters. (True/False)

Primary Functions of Router

1. Determine the best path to send packets

2. Forward packets toward their destination


It is not possible for a router to receive a packet that is encapsulated in one type of data link frame and to forward the packet out of an interface that uses a different data link frame. (True/False)

Static and Dynamic Routing

What does routers use to learn about remote networks and build their routing tables?

Process switching

A packet forwarding mechanism which uses a control plane and determines dest. address for every packet. It is slow and rarely implemented in modern networks.

Fast switching

It uses a fast switching cache to store next hop info. It will first undergo process switching if the packet is not found in the cache. So that for the next packet with the destination, it will be reused.

Cisco Express Forwarding

Most recent and preferred Cisco IOS packet forwarding mechanism. It builds a Forwarding Info Base and an adjacency table.


CEF is change triggered (True/False)


Fast switching is change triggered. (True/False)

IP address

Identifies a unique host on a local network

Subnet mask

Identifies with which network subnet the host can communicate.

Default gateway

Identifies the IP address of the router to send a packet to when the destination is not on the same local network subnet.

Degault gateway

It is the destination that routes traffic from the local network to devices on remote networks. Often used to connect a local network to the Internet.

Gateway of last resort

A router is usually configured with its own default gateway called ________.

Topology diagram

Provides a visual reference that indicates physical connectivity and logical layer 3 addressing.

Addressing table

A table used to capture device names, interfaces, IPv4 addresses, subnet masks, and default gateway.


A host is manually assigned a unique IP address, subnet mask, and default gateway. The DNS server IP address can also be configured.


The host receives its IP info automatically from a DHCP server.


The actual function of the LEDs are all the same for all devices. (True/False)

Secure Shell (SSH) or Hypertext Transfer Protocol Secure (HTTPS)

In a working environment, infrastructure devices are commonly accessef remotely using these.


______ access is really only required when initially configuring a device, or if remote access fails.


A switch does not have a dedicated interface to which an IP address can be assigned. (True/False)

Switched Virtual Interface (SVI)

IP address info is configured on a virtual interface of a switch called ___________.


Cisco routers and switches support a similar modal OS, command structures and many of the same commands. (T/F)

High-speed WAN Interface Card

Interface cards used to accommodate other types of network interfaces, including serial, DSL and cable interfaces.


The command used so that the interface could be confugured with a short description of up to 240 characters.

ipv6 enable

An interface command used so that an interface can generate its own IPv6 link local address without having a global unicast address

ipv6 unicast-routing

A global config command that is used so that the router can send ICMPv6 router advertisement messages out the interface. It enables a PC connected to thw interface to automatically configure an IPv6 address and to set a default gateway without needing the services of a DHCPv6 server.

Loopback interface

A logical interface internal to the router. Not assigned to a physical port so therefore, it cant be connected to any device. Automatically placed in an "up" state as long as the router is functioning.

Loopback interface

It is useful in testing and managing a Cisco IOS device because it ensures that at least one interface will always be available.


You can only enable one loopback interface on a router. (T/F)

show ip interface brief

displays a summary for all interfaces, including the IPv4 address of the interface and the current operational status.

show ip route

Displays the content of the IPv4 routing table stored in RAM.

show running-config interface interface-id

Displays the commands configured on the specified interface

Local host route

It is for routes on the router owning the IP address. Has an AD of 0. /32 mask for IPv4 and /128 for IPv6.

Used to allow the router to process packets destined to that IP.

show interfaces

Displays interface information and packet flow count for all interfaces on the device.

show ip interface

displays the IPv4 related information for all interfaces on the router


Commands that generate multiple screens of output are, by default, paused after _____ lines.


Pressing _____ displays the next line.


Pressing ______ displays the next set of lines.

terminal length

The command used to specify the number of lines to be displayed.


filtering parameter that shows entire section that starts with filtering expression


Filtering parameter that includes all output lines that match the filtering expression.


Filtering parameter thay excludes all output lines that match the filtering expression.


Filtering parameter that shows all output lines from a certain point, starting with the line that matches the filtering expression.

Ctrl+P or Up Arrow

Recall commands in the history buffer

Ctrl+N or Down Arrow Key

Return to more recent commands

show history

Privileged exec command to display the contents of the history buffer. By default, command history is enabled and captures the last 10 command lines in the buffer.

terminal history size

user exec command to increase or decrease the size of the history buffer.

Switching function

A process used by the router to accept a packet on one interface and forward it out another interface.


MAC addresses are only required on Ethernet multiaccess networks. Serial links have no MAC addresses.


The end device uses this operation to determine its own subnet and to determine if the destination address is on the same network.

Packet destination address & end device subnet mask

What do you need when performing ANDING to know if the destination device is on a local/remote network?

Gateway of Last Resort

It is set when a default route is configured or learned on a router.


Quantitative value used to measure the distance to a given network.

Hop Count

The metric used for Routing Information Protocol (RIP)

Cost based on Cumulative Bandwidth

The metric used in Open Shortest Path First (OSPF)

Bandwidth, delay, load, reliability

The metric used in Enhanced Interior Gateway Routing Protocol.

Equal cost load balancing

When a router has two or more paths to a destination with equal cost metrics, then the router forwards the packet using both paths equally.

Administrative distance

Represents the "trustworthiness" of the route. Determines the route to install into the IP routing table.


The code that identifies the address assigned to a router's interface. Allows the router to efficienrly determine when it receivea a packet for the interface instead of being forwarded.


Code that identifies a static route


Code the identifies a dynamic protocol using EIGRP